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Driven accessory with low-power clutch for activating or de-activating same

a technology of clutches and accessories, which is applied in the direction of mechanical actuated clutches, machines/engines, roads, etc., can solve the problems of significant fuel efficiency penalties and problems with their operation in a drive system

Active Publication Date: 2010-05-20
LITENS AUTOMOTIVE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0019]a method for operating a clutch assembly having an actuator with an electromagnet and an axially movable actuator member that is movable by the electromagnet, the method comprising alternating a magnetic field produced by the electromagnet to reduce or eliminate residual magnetism in the actuator member;

Problems solved by technology

While such engine accessories are widely employed, some issues with their operation in a drive system have been identified.
We note, for example, that one type of electromagnetic clutch mechanism that is commonly employed with air conditioning compressors requires a significant amount of electrical power to engage the clutch, which can result in a significant fuel efficiency penalty.

Method used

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  • Driven accessory with low-power clutch for activating or de-activating same
  • Driven accessory with low-power clutch for activating or de-activating same
  • Driven accessory with low-power clutch for activating or de-activating same

Examples

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Embodiment Construction

[0065]With reference to FIGS. 1 and 2 of the drawings, a driven accessory constructed in accordance with the teachings of the present disclosure is generally indicated by reference numeral 10. The driven accessory 10 can comprise an input member 12, a substantially conventional accessory portion 14 and a clutch assembly 16. In the particular example provided, the accessory portion 14 is a water pump assembly 20, but those of skill in the art will appreciate that the depiction of a water pump assembly 20 is merely illustrative of one application of the present teachings and that the present teachings have application to various other types of engine accessories, such as cooling fans 14-1 (FIG. 26); starter-generators or alternator-starters 14-2 (FIG. 27); air conditioning compressors 14-3 (FIG. 28); power steering pumps 14-4 (FIG. 29); generators or alternators 14-5 (FIG. 30); pumps including vacuum pumps 14-6 (FIG. 31), blowers, super chargers, power take-offs, etc., as well as acce...

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PUM

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Abstract

A driven accessory having a clutch that permits selective operation of an accessory portion. The clutch employs rotational inertia to control driving engagement of a wrap spring to an interior clutch surface on a drive member and / or driving disengagement of the wrap spring from the interior clutch surface.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims the benefit of U.S. Provisional Patent Application No. 61 / 115,223 filed Nov. 17, 2008, U.S. Provisional Patent Application No. 61 / 159,608 filed Mar. 12, 2009 and U.S. Provisional Patent Application No. 61 / 229,385 filed Jul. 29, 2009. The disclosures of each of the above-referenced applications is incorporated by reference as if fully set forth in detail herein.INTRODUCTION[0002]The present disclosure relates to a driven accessory with a low-power clutch for activating or deactivating the driven accessory.[0003]Most vehicle engine systems include one or more driven devices, typically referred to as “accessories”, which are driven by the vehicle engine for a variety of purposes. Such accessories can be connected to the engine via an accessory drive, a timing drive, etc. which can comprise a belt drive (e.g., a drive that employs a v-belt, a multi-v belt, a toothed belt, a helically opposed tooth belt, etc.), a chain ...

Claims

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Application Information

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IPC IPC(8): F16D13/04F16D27/02F16D43/24
CPCY02T10/76F16D27/105F02B67/04F16D13/12F16D27/02F16D27/10Y02T10/60
Inventor KOMOROWSKI, JACEK S.PARSONS, SCOTTANTCHAK, JOHN R.STANIEWICZ, ZBYSLAWDANCIU, JOHNWILLIAMS, WARRENMEVISSEN, PIERRE A.
Owner LITENS AUTOMOTIVE INC
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